import * as path from "path";
import {
  ComparativeMatcherPlugin,
  ComparativeMatcher,
  PerturbConfig,
} from "../types";
// matches:
//   source: project/lib/dir/file.js
//   test: project/test/dir/file.js

const plugin: ComparativeMatcherPlugin = {
  type: "matcher",
  name: "comparative-matcher-plugin",
  matchType: "comparative",
  makeMatcher(c: PerturbConfig): ComparativeMatcher {
    return (sourceFile: string, testFile: string): boolean => {
      const perturbRoot = path.join(c.projectRoot, c.perturbDir);
      const sourceName = sourceFile
        .split(path.join(perturbRoot, c.sourceDir))
        .pop();
      const testName = testFile.split(path.join(perturbRoot, c.testDir)).pop();
      return sourceName === testName;
    };
  },
};

export default plugin;